- 您現在的位置：買賣IC網 > PDF目錄363881 > W3011 1 GHz Quadrature Modulator PDF資料下載
參數資料
| 型號： | W3011 |
| 英文描述： | 1 GHz Quadrature Modulator |
| 中文描述： | 1 GHz的正交調制器 |
| 文件頁數： | 6/12頁 |
| 文件大小： | 199K |
| 代理商： | W3011 |
W3011
1 GHz Quadrature Modulator
Data Sheet
September 1999
6
Lucent Technologies Inc.
Explanation of Error Vector Magnitude (EVM) Testing
Error vector magnitude (EVM) is estimated by feeding signals to the W3011 as described above in Table 5.
A typical narrowband, sine-wave modulation output spectrum appears in Figure 3.
U5
–62 dBm
U4
–70 dBm
U3
–72 dBm
U2
–50 dBm
USB
0 dBm
Fc
–40 dBm
LSB
–38 dBm
L2
–70 dBm
L3
–48 dBm
L4
–75 dBm
L5
–72 dBm
0
–10
–20
–30
–40
–50
–60
–70
–80
fl = fQ = 80 kHz
f
LOL
= 130 MHz
f
LOH
= 1030 MHz
M
899.60
899.68
899.76
899.84
899.92
900.08
900.16
900.24
900.32
900.40
900
FREQUENCY (MHz)
Figure 3. W3011 Sine-Wave Modulation Output Spectrum
Data from this spectrum is used to estimate EVM by the formula:
100
[10
P(L5)/20
+ 10
P(L4)/20
+ 10
P(L3)/20
+ 10
P(L2)/20
+ 10
P(LSB)/20
+ 10
P(U2)/20
+
10
P(U3)/20
+ 10
P(U4)/20
+ 10
P(U5)/20
]/10
P(USB)/20
EVM (%) =
The data presented in the spectrum above would yield:
EVM (%) = 100
[251e–6 + 178e–6 + 3981e–6 + 316e–6 +
12589e–6 + 3162e–6 + 251e–6 + 316e–6 + 794e–6]/1000e–3
= 2.18%
This approximates worst-case digital modulation results, because the sine-wave modulation estimate assumes all
spurious outputs are in phase and adds their magnitudes as scalars. In addition, this estimate includes full-
amplitude measurements of spurious peaks that would appear in adjacent and alternate channels, where a
receiver would otherwise provide attenuation. The L3 third-order intermodulation peak and LSB (lower sideband)
are normally the unwanted output frequencies that dominate the EVM estimate.
相關PDF資料 |
PDF描述 |
|---|---|
| W3013 | W3013 Indirect Quadrature Modulator with Gain Control |
| W3013BCL | W3013 Indirect Quadrature Modulator with Gain Control |
| W3020 | GSM Multiband RF Transceiver |
| W3030 | W3030 3 V Dual-Mode IF Cellular Receiver |
| W3100A | i2Chip W3100A |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W3011A | 功能描述:天線 GPS Ceramic Antenna RoHS:否 制造商:Molex 技術類型:Cellular Antenna 頻率: 帶寬: 尺寸:106.7 mm L x 13 mm W |
| W3011A-K | 功能描述:天線 GPS CERAMIC EVALUATION KIT RoHS:否 制造商:Molex 技術類型:Cellular Antenna 頻率: 帶寬: 尺寸:106.7 mm L x 13 mm W |
| W3011-K | 功能描述:天線 GPS Ceramic Evaluation Kit RoHS:否 制造商:Molex 技術類型:Cellular Antenna 頻率: 帶寬: 尺寸:106.7 mm L x 13 mm W |
| W3012 | 功能描述:天線 ISM Ceramic Antenna RoHS:否 制造商:Molex 技術類型:Cellular Antenna 頻率: 帶寬: 尺寸:106.7 mm L x 13 mm W |
| W3012-K | 功能描述:天線 900MHz Ceramic Evaluation Kit RoHS:否 制造商:Molex 技術類型:Cellular Antenna 頻率: 帶寬: 尺寸:106.7 mm L x 13 mm W |
發布緊急采購，3分鐘左右您將得到回復。